/*
 * Copyright 2013-2019 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package sample;

import brave.handler.MutableSpan;
import brave.handler.SpanHandler;
import brave.propagation.TraceContext;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.web.client.RestTemplate;

/**
 * @author Spencer Gibb
 */
@SpringBootApplication
@EnableAsync
public class SampleZipkinApplication {

	public static void main(String[] args) {
		SpringApplication.run(SampleZipkinApplication.class, args);
	}

	@Bean
	public RestTemplate restTemplate() {
		return new RestTemplate();
	}

	// Use this for debugging (or if there is no Zipkin server running on port 9411)
	@Bean
	@ConditionalOnProperty(value = "sample.zipkin.enabled", havingValue = "false")
	public SpanHandler spanHandler() {
		return new SpanHandler() {
			@Override
			public boolean end(TraceContext context, MutableSpan span, Cause cause) {
				System.out.println(span.toString());
				return true;
			}
		};
	}

}
